Some results of research and forecasting of groundwater salinization in the coastal zone of Soc Trang province

Nguyen Thi Nhan, Dang Tran Trung, Bui Thi Bao Anh, Nguyen Xuan Tung, Nguyen Xuan Thanh

Abstract


In recent years, the situation of salinity intrusion is very complicated and becomes more serious in the coastal area of Soc Trang province. In this research, SEAWAT modified water density flow model was used to forecast the salinity intrusion for Holocene aquifer (qh) and upper Pleistocene aquifer (qp3) according to the water use planning scenario. The results show that the impact of groundwater extraction process increases the TDS content in the aquifer, the salt water/fresh water areas change over time, the trend of salinity change increases. In Holocene aquifer, salt water area is relatively large and the TDS concentration increases towards the sea, however, fresh water area changes inconsiderably: In 2015 accounting for 17.42% and by 2030 accounting for 17.77% of aquifer area. In upper Pleistocene aquifer, the fresh water area declines significantly: In 2015 accounting for 9.35% and by 2030 only accounting for 7.53% of aquifer area.

Keywords


SEAWAT model, salinity intrusion, salinity forecasting, aquifer, Soc Trang coastal area.

Full Text:

PDF

References


Thorne, D., Langevin, C. D., and Sukop, M. C., 2006. Addition of simultaneous heat and solute transport and variable fluid viscosity to SEAWAT. Computers & Geosciences, 32(10), 1758–1768.

Simmons, C. T., Fenstemaker, T. R., and Sharp Jr, J. M., 2001. Variable-density groundwater flow and solute transport in heterogeneous porous media: approaches, resolutions and future challenges. Journal of Contaminant Hydrology, 52(1–4), 245–275.

Vandenbohede, A., Hinsby, K., Courtens, C., and Lebbe, L., 2011. Flow and transport model of a polder area in the Belgian coastal plain: example of data integration. Hydrogeology Journal, 19(8), 1599–1615.

Tsai, F. T., and Li, X., 2008. Saltwater intrusion and hydraulic conductivity estimation in East Baton Rouge Parish, Louisiana. In 20th Salt Water Intrusion Meeting.

Larabi, A., Faouzi, M., and Cheng, A. H. D., 2008. Assessment of groundwater resources in Rmel coastal aquifer (Morocco) by SEAWAT. In 20th Salt Water Intrusion Meeting (Naples, Florida, US Geological Survey) (pp. 136–140).

Jackson, C. P., and Watson, S. P., 2001. Modelling variable density groundwater flow. Physics and Chemistry of the Earth, Part B: Hydrology, Oceans and Atmosphere, 26(4), 333–336.

Trần Thị Huệ và nnk., 2011. Ứng dụng mô hình dòng ngầm ba chiều để xác định lượng cung cấp và trữ lượng có thể khai thác của nước dưới đất tại khu vực các tỉnh phía tây sông Hậu. Cục Quản lý Tài nguyên nước, Bộ Tài nguyên và Môi trường.

Ngô Đức Chân, 2010. Quy hoạch khai thác, sử dụng và bảo vệ tài nguyên nước dưới đất tỉnh Sóc Trăng đến năm 2020. Liên đoàn Quy hoạch và Điều tra Tài nguyên nước miền Nam.

Sở Tài nguyên và Môi trường tỉnh Sóc Trăng, 2015. Cơ sở dữ liệu Địa chất thủy văn.

Guo, W., and Langevin, C. D., 2002. User’s guide to SEAWAT; a computer program for simulation of three-dimensional variable-density ground-water flow (No. 06-A7).

Guo, W., and Bennett, G. D., 1998. SEAWAT version 1.1-A computer program for simulations of ground water flow of variable density. A report prepared by Missimer International Inc.

Guo, W., and Bennett, G. D., 1998. Simulation of saline/fresh water flows using MODFLOW. In MODFLOW 98 Conference, Golden, CO. In: Poeter, E. et al. (Ed.), 1998 Proceedings (1) (pp. 267–274).




DOI: https://doi.org/10.15625/1859-3097/19/3B/14526 Display counter: Abstract : 108 views. PDF : 140 views.


Editorial Office:

Vietnam Journal of Marine Science and Technology

1st Floor, A16 Building, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7411

E-mail: jmst@vjs.ac.vn